code: def replace_emoji(x):
      if x in UNICODE_EMOJI.keys():
          return " " + UNICODE_EMOJI[x].replace(":", "@") + " "
      else:
          return x
  
file_path: ParlAI/parlai/tasks/twitter/build.py
imports: import io
  import gzip
  import parlai.core.build_data
  import os
  from parlai.core.build_data import DownloadableFile
  from parlai.utils.io import PathManager
label_desc: Use image node_id 1 for calling a global function with example usage: replace_emoji(x) and returns: unknown, x